Haven't taken the time to bother with these as they weren't all that big of a deal, but I guess I better as it should get fixed at some point. These have been there since the day I started using the app so it's not something just recently happening with any of the updates.
Copy/Paste of text always adds a space at the end of everything you paste. This should not happen.
Copy/Paste text does not always copy a space if one was intentionally copied. Seems to matter which way you highlight. Left t right seems to work quite a bit lately, but right to left never works for me at all to catch that added space.
Deleting text back to the first letter of a line should still retain the line's attributes such as Bold, Italics, etc. It seems to only catch the first letter and then after that it drops all formatting.
I know there are a few more, but these are the few that come to mind as prevalent as they happen a lot.